Well-drilling machine.



A. G. STEWART.

WELL DRILLING MACHINE.

APPLICATION FILED MAB. 11, 1912.

Patented Jan. 20, 191i & x195 a 7m7az/1 d [N/ STATESPATENT' OFFICE (human 0. srnwanr, or use moieties, eausohuua, 'assiouoa or one-marine nonnazr wn'rononu, .0? L08 monument-momma. v

,wnLn-narntmo kiicnmn 1,084,762. Specification of Mtw rmnt Patented J an. 20, 1914. Application med lunch 11, 1812. serial No 688,102.

To all whom it may concern: tube and the upper end of the series of 'tubu- Be it known that I, ALFRED 'G. sanwan'r, lar shafts being connected to a tubular mema citizen of the United States, residing at her 58 adaplted to rotate within a fixed bear- Los Angeles, in the county of Los Angeles mg 51 at t e top of the uppercase member 6. and State of California, have invented a new 10. A supply pipe 56 co'mmunioates with a co and useful WelLDrillinE Machine, of which assage 5O m-said up er bearing member 51. the following is a speci cation. a otary members ave central bores 56' The main object of the present invention forming a continuous assage connecting isto-provide for drilling wells by a hydrau-i through he bore of tubular member 58 with .0 lica-lly operated drill an to utilize the water p pe 56, and also connecting with a bore 67 is issuing from the drill oiperating means-n1- -m the drilling tool to form an outlet or hydraulicking the well uring the drilling waste assage for the water.

operation, 22 eslgnates a fluid accumulator inter- Afurther object of the invention is to proposed in the communication between the vide for protectin the drill operating mcchsupply pipe and the respective rotary motive 70 anism from the a rading action of grit or devices 15. Said rotary motive devices 15 dirt in the water. may be of any suitable construction ada ted The accompanying drawing is a vertical to receive operating fluid from the flui acsection of a well drilling tool embodying my cumulator 22 in such manner that the presinvention. sure of the fluid rotates the said members 15 76 1 designates a well casing within w'hlch and causes rotation of the drilling tool 3. the drilling device is supported in any suit- The construction of such rotary motive deable manner, said drilling device comprisvices forms no part of my invention and is ing, for example, a lower member 2 on which herein not described in detail.

the drilling tool '3 is mounted, and any de- The drilling tool 3 may be of any usual or 80 sired number of driving elements secured to suitable construction comprising, for examthe lower member 2, there being shown a ple, a head of conical form provided with plurality of such elements arranged one cutters 3 and with internal passages 66 comabove another in a vertical series and conmunicating with the bore 67 in an upward "l0 nected to operate the drilling tool 3. Each extension 68 from said head, said upward 86 driving element comprises an annular outer extension being connected by a flange 68 case 4, said cases 4 being connected together thereon and bolts 7 to the flange 36 of the by rabbeted flanges 5 and 6 at their lower lowermost rotary driving member 15. The and upper ends respectively,and by bolts 7 tubular member 68 serves as a shaft for the securing said flanges together. The lowerdrilling tool or head and is journaled in a 00 most case ,4 is secured by bolts 7 to a flan e vertical bearing 70 on the bottom member 2.

8 on the upper end of the member 2 and t e Said bottom member 2 and top member 10 uppermost member 4 is secured by bolt 7 to are formed as shells or chambers and a pipe a ange 9 on top member 10, the several 72 extends through the top of the top mom- 4 members 2, 4 and 10 bein secured together her 10 and down through the entire string 2 in this manner so as to orm a cylindrical of driving units to the bottom of the chambody of uniform diameter throughout, her 2 in the bottom member 2.

adapted to slide down through the well cas- In operation, the chamber and top meming and to be retained from rotation when in her 10, the spaces within the annular casing position at the lower end of the casing by members and the chamber 2 in the bottom suitable means such as lugs 11 on the memmember 2 are all flooded with oil supplied her 2 engaging against lugs 12 on the casing through an o ning in top member 10, nor- 1. Each drivmg member further comprises mally closed y a plug 10', forming a cona rotary member 15 mounted to rotate withtinuous body of oil so that any water which in the corresponding fixed case 4, and said leaks from the water communications into rotary members being connected together by this body of oil will find its way to the botcouplings 36 on hollow shafts 16 connected tom of'the bottom chamber 2' and on acto the respective members 15, the lower end cumulation of water under the presure of ofthe series of hollow shafts 16 being conthe supply, any excess of water will ass out 55 nect-ed to the tubular stem of the drilling through the pipe 72, this pipe extending into the water which collects at the bottom of said chamber 2'. therefore wholly of water, the oil being retained within the casings. By thus flooding the entire space within the casings with oil, water is prevented from gaining access to the working parts and they are kept well lubricated.

\Vhat I claim is:

In a rotary drilling tool, the combination of a casing, a drilling tool rotatably mounted at the lower end of said casing, hydraulically operated rotary driving means within said casing connected to operate said drilling tool, said casing being provided with an opening at its upper portion whereby said casing may be filled with oil so as to flood The loss by leakage is.

the working parts therein, removable means for closing said opening, means for supplyingwvater to the hydraulically operated rotary driving means, and a pipe extending from near the bottom of said casing to the upper end thereof and opening at its upper end outside of the casing to drainoif water leaking from said hydraulically operated r0- tary driving means.

In testimonywhereof, I have hereunto set my hand at Los Angeles, day of March, 1912.

ARTHUR P. mm, Gamma Russnmi.

California this 5th, 

